Glue or sizing.



UNITED STATES PATENT OFFICE.

MONE n. IsAACs, OF PHILADELPHIA, PENNSYLVANIA.

GLUE OR s|z||\|c-:..

To aZl whom it may concern.-

Be it known that I, IVIONE R. IsAAos, a citi' zen of the United States,and a resident of the city and county of Philadelphia, in the State ofPennsylvania, have invented certain new and useful Improvements in Glueor Sizing, of which the following is a full, clear, and eX actdescription.

The object of my invention is the preservation and enriching ofsubstances liable to decaysuch, for instance, as animal proteids andglue, sizing, or paste prepared therefrom. In the preservation of suchsubstances, particularly of sizing or paste, it has been very difficultto utilize well-known preservatives, because many of the latter have aninjurious efiect upon the sizing or paste.

My invention consists in the discovery that by combining with an animalor vegetable proteid a small proportion of sodium fluorid, not only willthe proteid be prevented from decaying, but its qualities will beunimpaired. Thus when used with casein-sizing (which, as is well known,may consist of casein and an alkali) it not only preserves the samewithout deleterious effect, but also assists in making such sizing hardand waterproof when dried after using, does not precipitate the caseinin the sizing when in solution, and also serves as a mordant.

In carrying out my invention I would mix,

Specification of Letters Patent.

Application filed February 24;, 1906. Serial No. 302,753.

Paten'ted. Dec. 18, 1906.

either in a/ dry powdered state or as a solution, if preferred, abouttwo per cent. of the sodium fluorid with the sizing or substance to bepreserved. Sodium fluorid being readily soluble in water when mixed in adry state with the sizing, such as the well-known caseinsizing, willdissolve with the sizing when the latter is prepared for use withoutcausing any precipitation of the latter.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A new composition of matter comprising sodiumfiuorid and a proteid.

2. A new composition of matter comprising sodium fluorid and an animalproteid.

3. A composition of matter comprising casein, an alkali, and sodiumfluorid.

4. A composition of matter comprising, in a dry powdered stat-e, casein,an alkali, and sodium fluorid.

5. A composition of matter comprising casein-sizing, and two per cent.of sodium fluorid.

In testimony whereof I have hereunto affixed my signature.

MONE R. ISAACS.

Witnesses:

WALTER O. PUsEY, WM. H. SMITH.

